If tidor neder to God, your God … (Deuteronomy 23:22)
tidor (תִדֺּר) = you vow, you will vow. (A form of the verb nadar, נָדַר = made a vow.)
neder (נֶדֶר) = a vow. (Noun from the root verb nadar.)
This week’s Torah portion, Ki Teitzei (Deuteronomy/Devarim 21:10-25:19), advises against making any vows to God.
The Hebrew Bible distinguishes between vow and an oath. The noun neder appears 58 times in the bible, always as a vow made to God. (An oath is a shevuah (שְׁבוּעָה), and people never swear oaths to God, only to other people. God swears oaths to people in the Hebrew Bible, but never makes a neder.)
People in the Hebrew Bible vow to give God an animal sacrifice, or to give money to the Temple treasury. Another type of vow is to dedicate oneself to God for a fixed period of time as a nazir. A nazir separates him or herself from ordinary public life by refraining from haircuts, wine, and anything else made with grapes. (See my post Naso: Distanced by Hair.)
The Torah portion Ki Teitzei warns that if you do make a vow to God, you must carry it out without delay—but it is better to refrain from vowing in the first place.
If you vow a vow to God, your God, you should not delay in fulfilling it, because God, your God, will definitely require it from you, and you will have incurred guilt. But if you forego vowing, you will not incur guilt. What goes out from your lips, you must observe; and you do must do as you vowed to God, your God, voluntarily, as you spoke with your mouth. (Deuteronomy 23:22-24)
(There are so many variants of the verb nadar in this passage, I will use the English words for vowing a vow in the rest of this post.)
Before we examine the three verses separately, let’s look at why people in the Hebrew Bible make vows to God in the first place.
Conditional vows
Both conditional and unconditional vows appear in the bible. People make conditional vows when they hope that their vow will make God feel inclined to give them what they want.
Rabbi Chaim Potok wrote: “A person who sought God’s aid in achieving a desired goal or relief from distress—the birth of a child, victory in battle, recovery from illness, escape from danger—might promise to do something pleasing to God afterward in gratitude for His assistance.”1
In three of the psalms, the speakers thank God for helping them win a battle, then say they will carry out their vows to make extra offerings at the altar.2 Presumably they made these vows before the battle, and will fulfill them when they return to the temple.
There are also three biblical stories about conditional vows. In the book of Genesis, Yaakov (“Jacob” in English) leaves home for the first time in his life, fleeing from a brother who wants to kill him. He dreams of angels going up and down a ramp between heaven and earth, with God standing above and promising to help him. When he wakes up,
Then Yaakov vowed a vow, saying: “If God will be with me, and watch over me on this way that I am going and will give me food to eat and a garment to wear, and if I come back safely to my father’s house, then Y-H-V-H will be my God, and this stone that I have set up as a standing-pillar shall become a house of God, and everything that you give me I will definitely tithe to you.” (Genesis 20:22)
Yaakov may be going overboard with all his conditions, but in the next story about a conditional vow, the man who vows does not make enough conditions. When Yiftach is about to lead his troops against the Ammonites,
Then Yiftach vowed a vow to God, and said: “If it is given—[if] you give the Ammonites into my hand—then it will be the one going out, that goes out from my door of my house to meet me when I return safely from Ammon, will be for God. And I will offer it up as a rising-offering.” (Judges 11:30-31)
Even the general of a small army might keep livestock in part of his compound, and Yiftach might have been imagining an animal coming out. He later regrets his vow, since the first thing that comes out of his door when he returns is his only child. (See my post Haftarat Chukat—Judges: A Peculiar Vow.)
In the first book of Samuel, Chanah (“Hannah” in English) desperately wants a baby. She walks up to the temple in Shiloh and prays.
And she vowed a vow, and she said: “Y-H-V-H of Armies, if you actually see the hardship of your maidservant, and you remember me and do not forget your maidservant, and if you grant your maidservant a male child, then I will give him to Y-H-V-H for all the days of his life, and no razor will go over his head.” (1 Samuel 1:11)
She seems to be vowing that if God gives her a son, she will make him a nazir. But after she has a son and has weaned him, she goes farther and gives him to the temple, where he becomes a prophet.
Unconditional vows
Making a vow to be a nazir is an unconditional vow; the nazir is willing to exercise self-restraint in order to be holy to God, and expects no special favors.
Another type of unconditional vow is the dedication of a future donation to God for no other reason than a generous or religious impulse. Leviticus 27:1-8 provides a price list for unconditional vows in which a man dedicates a member of his household as a donation, and then (instead of sacrificing the person, like Yiftach) gives the temple the value of that person in silver. (See my post Bechukotai: Gender, Age, and Personal Value.) This passage is followed by rules about unconditional vows of animals, of houses, and of land.3
No delay
The passage on vows in this week’s Torah portion begins by emphasizing that God will brook no delay in fulfilling a vow to God.
When you vow a vow to God, your God, you shall not delay in fulfulling it, because God, your God, will definitely require it from you, and you would have incurred guilt. (Deuteronomy 23:22)
If you vow to be a nazir, you begin at once. If you vow to bring an offering, you should do it as soon as it is feasible for you to go to the sanctuary or temple.
What counts as a delay? The Talmud decrees:
“Whether one makes a vow to bring an offering to the Temple, or consecrates an item to the Temple, or makes a valuation, promising to pay the value of a particular person to the Temple treasury, once three Festivals have passed from that day and he has not yet fulfilled his promise, he transgresses the prohibition … Rabbi Shimon says: One transgresses the prohibition against delaying not when any three Festivals have passed, but when three Festivals have passed in their proper order, i.e., Passover, Shavuot, and Sukkot, with Passover first.”4
So if you vow to bring something specific to the sanctuary or temple, you are in the clear even if you do not bring it until the autumn festival of Sukkot the following year. But if you wait longer than that, God will punish you. The classic commentary gives examples of God punishing a transgressor with death at sea, the death of one’s wife, and the death of one’s child.
Why is not fulfilling a vow to God such a terrible crime? For the ancient Israelites, a vow to God was holy. Therefore violating your vow was a desecration.
Anyone who vows a vow to God, or swears an oath to abstain an abstention for himself, he must not desecrate his word; according to anything that goes out of his mouth, he must do. (Numbers 30:3)
Bachya ben Asher explained: “Self-imposed vows … are holier than the ordinary commandments; this is why the Torah has to warn especially against not honoring them.”5
Better not to vow
The next verse in Ki Teitzei gives advice.
But if you forego vowing, you will not incur guilt. (Deuteronomy 23:23)
The book of Ecclesiastes repeats this advice, after calling anyone who delays fulfilling a vow a fool.
When you vow a vow to God, you must not delay in fulfilling it. For [God] has no pleasure in fools. What you vow, fulfill! Better that you do not vow, than that you vow and do not fulfill. (Ecclesiastes 5:3-4)
Ramban explained: “God has no pleasure in fools who think that they do a good deed when they utter many vows to serve as encouragement to fulfill a commandment which they plan to do, and they do not consider in their hearts … ‘Perhaps I will not be able to fulfill all these vows.’ Instead he thinks that the desire he had at the time of his vow will be accounted to him for good.”6
Bachya ben Asher sensibly concluded: “If one wants to bring an offering to God, one should do so at the time when one decides on it, without first making a vow about it.”7
Voluntary?
Next, this week’s Torah portion emphasizes that while some altar offerings are required, you act on your own initiative when you make a vow to God to donate something extra.
What goes out from your lips, you must observe; and you do must do as you vowed to God, your God, nedavah, as you spoke with your mouth. (Deuteronomy 23:24)
nedavah (נְדָבָה) = voluntarily, of your own free will; a voluntary offering.
People can silently plan to bring God an extra gift, but they have to speak out loud for the plan to count as a vow.
Why does this verse include the word nedavah? According to Chizkuni, the word nedavah fixes the blame on the person who made the vow. “‘as you have vowed, voluntarily.’ No one forced you to make such a vow, so that not honouring it, or delay in honouring it is entirely your fault.”8
However, by the 9th century C.E., long before the Spanish Inquisition, Jews in Spain were being forced to convert to either Christianity or Islam on pain of death. They wanted to make sure God would not hold them to account for their vows of conversion, and they began starting the evening of Yom Kippur with the Kol Nidrei (“All Vows” in Aramaic), a plea to God to cancel the whole community’s vows of the past year.
But the word nedavah in our verse may not be intended as a contrast with coerced vows. According to the Talmud, it provides a ruling about the method of slaughtering. “The verse indicates that if you … sacrificed your vow offering properly, it shall be a satisfactory vow offering; but if you did not sacrifice it properly, it shall be rendered a voluntary gift offering. Although it does not satisfy the obligation of your vow, it remains a valid offering.”9
And according to Chayim ibn Attar, “The Torah uses the expression nedavah to indicate the generous frame of mind you were in when you made this promise.”10
After the fall of the second temple in Jerusalem, the statements about vows in this week’s Torah portion were applied to other kinds of vows, and those who failed to fulfill their vows without undue delay were punished by a Jewish court instead of by God. For example, Bachya ben Asher wrote: “If the subject of the vow were charitable donations, the donor is most certainly forced to fork over what he had promised even if the court has to put up some of his property for sale to satisfy his vow. The delay permitted then is even shorter, as the poor people for whom the donations were intended cannot afford to wait.”11
When did you last make a vow? Today, a formal vow in public is usually reserved for a wedding, an oath of office, or swearing to tell the truth as a witness. In all of these cases, we are making a commitment to other people. If God is mentioned at all, God is invoked as a witness and support (“so help me God”). Even monastic vows are made to other people: to a religious community.
Failure to fulfill a vow or an oath makes all your future vows questionable, and therefore unreliable. Sometimes people fail to live up to their vows because of circumstances they could not have anticipated. Others are carried away by their emotions, and rashly promise more than they can realistically deliver. As the portion Ki Teitzei indicates, people who make rash vows end up behaving less ethically than those who refrain from vowing in the first place.
This is the first week of Elul, the month leading up to Rosh Hashanah and Yom Kippur. The Jewish tradition is to spend this month examining ourselves, apologizing and making amends for the wrongs we have done to other people, and recognizing where we have failed the God inside each of us.
This Elul, may we remember the promises we broke, and the good deeds we delayed too long. May we recognize and make amends for our failures to fulfill our vows to others.
- Rabbi (and novelist) Chaim Potok, editor of p’shat commentary, Etz Hayim: Torah and Commentary, the Rabbinical Assembly of the United Synagogue of Conservative Judaism, New York, 2001, p. 1126.
- Psalms 56:10, 13; 61:6, 9; and 66:13.
- Leviticus 27:9-29.
- Talmud Bavli, Rosh Hashanah 4a, translated by Adin Even-Israel Steinsaltz, William Davidson Talmud, digital edition, Koren Publishers.
- 14th-century rabbi Bachya ben Asher, translation in www.sefaria.org.
- Ramban (acronym of 13th-century rabbi Moshe ben Nachman), translation in www.sefaria.org.
- Bachya ben Asher, ibid.
- 13th century commentary Chizkuni, translation in www.sefaria.org.
- Talmud Bavli, Zevachim 4b, translation by Steinsaltz, ibid.
- 18th-century rabbi Chayim ibn Attar, Or Hachayim, translation in www.sefaria.org.
- Bachya ben Asher, ibid.














